Three-way catalyst assembly welding fixture

The invention provides a three-way catalyst assembly welding fixture. The three-way catalyst assembly welding fixture comprises a first positioning seat and a second positioning seat which are arranged on the two sides of a welding robot side by side in parallel; and a first procedure clamping unit, a second procedure clamping unit and a third procedure clamping unit are connected to the first positioning seat; and the second positioning seat is connected with a fourth procedure clamping unit and a fifth procedure clamping unit. The three-way catalyst assembly welding fixture provided by the invention can accurately clamp and weld all parts in each procedure of a three-way catalyst assembly, the deviation phenomenon caused by unstable fixation is prevented, no loosening phenomenon occurs in the welding process, the product welding effect is improved, the reject ratio of the catalyst assembly in the welding process is reduced, the welding fixture is reasonable in design, the space utilization rate is increased